CN110509625A - A kind of oxidative biodegradation rubbish from cooking bag - Google Patents

A kind of oxidative biodegradation rubbish from cooking bag Download PDF

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Publication number
CN110509625A
CN110509625A CN201910490002.6A CN201910490002A CN110509625A CN 110509625 A CN110509625 A CN 110509625A CN 201910490002 A CN201910490002 A CN 201910490002A CN 110509625 A CN110509625 A CN 110509625A
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China
Prior art keywords
layer
additive
resin
degradation
internal
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Withdrawn
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CN201910490002.6A
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Chinese (zh)
Inventor
刘文海
钟玉玲
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Green Plastic Kang (tianjin) Environmental Protection Technology Co Ltd
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Green Plastic Kang (tianjin) Environmental Protection Technology Co Ltd
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Priority to CN201910490002.6A priority Critical patent/CN110509625A/en
Publication of CN110509625A publication Critical patent/CN110509625A/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F1/00—Refuse receptacles; Accessories therefor
    • B65F1/0006—Flexible refuse receptables, e.g. bags, sacks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention belongs to biology base degradation technique field more particularly to a kind of oxidative biodegradation rubbish from cooking bags, including surface layer, middle layer, internal layer；The surface layer includes surface layer resin layer, surface layer additive layer, and the surface layer resin layer is sixfold controlled degradation (LCSZ) resin, and the surface layer additive layer is oxidation compost degradation (DFJ) additive；The middle layer includes middle layer resin layer, middle layer additive layer, the middle layer additive layer is located at the lower section of middle layer resin layer, the middle layer resin layer is oxygen-containing polymeric material controlled degradation (JHSZ) resin, and the middle layer additive layer is environmental oxidation degradation (YJZJ) additive；The internal layer includes inner layer resin layer, internal layer additive layer, the internal layer additive layer is located at the lower section of inner layer resin layer, the inner layer resin layer is oxygen-containing resin controlled degradation (YZSZ) resin, and the internal layer additive layer is environment aquation degradation (SHZJ) additive.

Description

A kind of oxidative biodegradation rubbish from cooking bag
Technical field
The invention belongs to biology base degradation technique field more particularly to a kind of oxidative biodegradation rubbish from cooking bags.
Background technique
With economic rapid development, people get worse the destruction of environment, especially nondegradable plastics, by people Arbitrarily throw out without care after, due to being not easy to be deposited in soil for a long time by soil microbial degradation, caused seriously to ecological environment Pollution.Disposable tableware, Phthalates and agricultural mulching etc. are difficult to be recycled, traditional processing side Method is based on burning and bury.Burning can generate a large amount of pernicious gas, pollute environment；Bury then that polymer therein is in short-term It is interior to be decomposed by the microorganisms, also pollute environment.The plastic foil of residual abandoning is present in soil, hinders the hair of crop root system It educates and the absorption to moisture, nutrient, reduces the gas permeability of soil, lead to crop production reduction；Movement eats the plastic foil of residual abandoning Afterwards, it will cause intestinal obstruction and dead；The synthetic netting and fishline for being lost in ocean or discarding in ocean are to ocean Biology causes comparable harm, therefore promotion green consumption and reinforcement environmental protection are imperative.
In order to reduce white pollution, preserving the ecological environment, people start to study degredation plastic, and the of research Generation degradative plastics is degradation plastic, and what this degradation plastic was added to sub-fraction on the basis of original raw material can Degradable master batch or starch-based initial material, major part are not can be carried out degradation, are also unfavorable for the recycling and reconstruction of plastics；Research Second generation degradative plastics be biology base controllable full-degradable plastics, using resourceful, reproducible biomass as raw material, degradation Process green cleans, and also helps the benign cycle in building soil and environmental system, is to alleviate oil crisis, eliminate white dirt The effective way of dye.
Currently, the double down solution rubbish from cooking bag of the oxidative biological of practical application, degrades not thorough enough, implementation result is bad.
Summary of the invention
The present invention provides a kind of oxidative biodegradation rubbish from cooking bag, to solve structure letter mentioned above in the background art It is single, not thorough enough problem of degrading.
Technical problem solved by the invention is realized using following technical scheme:
A kind of oxidative biodegradation rubbish from cooking bag, including surface layer, middle layer, internal layer；
The surface layer includes surface layer resin layer, surface layer additive layer, and the surface layer additive layer is located at surface layer resin layer Lower section, the surface layer resin layer are sixfold controlled degradation (LCSZ) resin, and the surface layer additive layer is oxidation compost degradation (DFJ) additive；
The middle layer includes middle layer resin layer, middle layer additive layer, and the middle layer additive layer is located at middle layer resin layer Lower section, the middle layer resin layer are oxygen-containing polymeric material controlled degradation (JHSZ) resin, and the middle layer additive layer is ambient oxygen Change degradation (YJZJ) additive；
The internal layer includes inner layer resin layer, internal layer additive layer, and the internal layer additive layer is located at inner layer resin layer Lower section, the inner layer resin layer are oxygen-containing resin controlled degradation (YZSZ) resin, and the internal layer additive layer is environment aquation drop Solve (SHZJ) additive.
The percentage thickness on the surface layer is 15%, and the percentage thickness in the middle layer is 70%, the thickness of the internal layer Percentage is 15%.
The percentage thickness of the surface layer resin layer is 90%, the percentage thickness of surface layer additive layer is 10%.
The percentage thickness of the middle layer resin layer is 85%, the percentage thickness of middle layer additive layer is 15%.
The percentage thickness of the inner layer resin layer is 95%, the percentage thickness of internal layer additive layer is 5%.
Described oxidation compost degradation (DFJ) additive, environmental oxidation degradation (YJZJ) additive, the degradation of environment aquation (SHZJ) additive is equal are as follows: aminodithioformic acid iron.
The invention has the benefit that
It can not only be realized by the technical program degradable, and implementation result is ideal, specific ingredient effect Fruit is as follows:
1 sixfold controlled degradation (LCSZ) resin: being added degradation modification resin in degradative plastics process of producing product, makes each The non-degradable plastic products of class become controllable degradable plastic products, have used the degradative plastics product of degradation modification resin When being exposed in sunlight, high temperature or external force, it will degradation, and degradation time and speed are controllable.Triple controllable drops Resin is solved in degradative plastics production process, is utilized the degradative resin of opposed polarity using multi-layer co-extruded moulding process Compost Biodegradation and oxidative biodegradation, are effectively combined together by special process co-extrusion working chamber, really realize degradation Controllability and degradable property.Triple controlled degradation non-toxics, comestible contact, processability is strong, can be with most of material Compatible, controlled degradation controls degradation time according to necessary requirement, and 100% environmental degradability is fully converted to water, dioxy Change carbon and organic matter, will not be harmful to environment or soil, cost performance is high, and compared with other degradation techniques, cost is relatively low.Three Weight controlled degradation resin is mainly used for refuse disposal system, packing business, agricultural, compost and plastics manufacturing industry, and it is each to be suitable for production Class degradative plastics product, such as farm-oriented mulch, drip irrigation zone, shopping bag, plastic bag, refuse bag, courier bag, mess-tin.
2 oxygen-containing polymeric material controlled degradation (JHSZ) resins: degradation modification is added in degradative plastics process of producing product Resin makes all kinds of non-degradable plastic products become controllable degradable plastic products, has used the degradation of degradation modification resin Plastic products are when being exposed in sunlight, high temperature or external force, it will degradation, and degradation time and speed are controllable.Three Weight controlled degradation resin is in degradative plastics production process, using multi-layer co-extruded moulding process, by the degradation tree of opposed polarity Compost Biodegradation and oxidative biodegradation are effectively combined together, really by rouge using special process co-extrusion working chamber Realize controlled degradation and degradable property.Triple controlled degradation non-toxics, comestible contact, processability is strong, can with it is big Some materials are compatible, controlled degradation, and degradation time is controlled according to necessary requirement, and 100% environmental degradability converts completely , will not be harmful to environment or soil for water, carbon dioxide and organic matter, cost performance is high, compared with other degradation techniques, at This is lower.Triple controlled degradation resins are mainly used for refuse disposal system, packing business, agricultural, compost and plastics manufacturing industry, fit Together in all kinds of degradative plastics products are made, such as farm-oriented mulch, drip irrigation zone, shopping bag, plastic bag, refuse bag, courier bag, mess-tin Deng.
3 oxygen-containing resin controlled degradation (YZSZ) resins: being added degradation modification resin in degradative plastics process of producing product, So that all kinds of non-degradable plastic products is become controllable degradable plastic products, uses the degradative plastics of degradation modification resin Product is when being exposed in sunlight, high temperature or external force, it will degradation, and degradation time and speed are controllable.It is triple can Degradative resin is controlled in degradative plastics production process, using multi-layer co-extruded moulding process, by the degradative resin of opposed polarity, Using special process co-extrusion working chamber, effectively Compost Biodegradation and oxidative biodegradation are combined together, really realized Controlled degradation and degradable property.Triple controlled degradation non-toxics, comestible contact, processability is strong, can be with major part Material compatible, controlled degradation control degradation time according to necessary requirement, 100% environmental degradability, be fully converted to water, Carbon dioxide and organic matter, will not be harmful to environment or soil, and cost performance is high, compared with other degradation techniques, cost compared with It is low.Triple controlled degradation resins are mainly used for refuse disposal system, packing business, agricultural, compost and plastics manufacturing industry, are suitable for Make all kinds of degradative plastics products, such as farm-oriented mulch, drip irrigation zone, shopping bag, plastic bag, refuse bag, courier bag, mess-tin.
4 are added degradant additive by proportion in material modification production process, and various modified resins is made to become controllably dropping The modified resin raw material of solution, is added degradant additive in degradation products production process, becomes all kinds of non-degradable plastic products Controllable completely degradable plastic product；Degradant additive is added in resin in plastic product production process, and without changing life Equipment and program are produced, the degradative plastics product of degradant additive is added to, when being exposed in sunlight, high temperature or external force When, it will degradation, and degradation time and speed are controllable；Degradant additive is non-toxic, and comestible contact, processability is strong, can be with Most of material compatible, controlled degradation control degradation time according to necessary requirement, and 100% environmental degradability turns completely Water, carbon dioxide and organic matter are turned to, will not be harmful to environment or soil, cost performance is high, compared with other degradation techniques, Cost is relatively low；Degradant additive is mainly used for refuse disposal system, packing business, agricultural, compost and plastics manufacturing industry, is suitable for Make all kinds of degradative plastics products, such as farm-oriented mulch, drip irrigation zone, shopping bag, plastic bag, refuse bag, courier bag, mess-tin.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
In figure: the surface layer 1-, the middle layer 2-, 3- internal layer, the surface layer 4- resin layer, the surface layer 5- additive layer, the middle layer 6- resin layer, 7- Middle layer additive layer, 8- inner layer resin layer, 9- internal layer additive layer.
Specific embodiment
A kind of oxidative biodegradation rubbish from cooking bag, including surface layer 1, middle layer 2, internal layer 3；
Surface layer 1 includes surface layer resin layer 4, surface layer additive layer 5, and surface layer additive layer 5 is located under surface layer resin layer 4 Side, surface layer resin layer 4 are sixfold controlled degradation (LCSZ) resin, and surface layer additive layer 5 is oxidation compost degradation (DFJ) addition Agent；
Middle layer 2 includes middle layer resin layer 6, middle layer additive layer 7, and middle layer additive layer 7 is located under middle layer resin layer 6 Side, middle layer resin layer 6 are oxygen-containing polymeric material controlled degradation (JHSZ) resin, and middle layer additive layer 7 is environmental oxidation degradation (YJZJ) additive；
Internal layer 3 includes inner layer resin layer 8, internal layer additive layer 9, and internal layer additive layer 9 is located under inner layer resin layer 8 Side, inner layer resin layer 8 are oxygen-containing resin controlled degradation (YZSZ) resin, and internal layer additive layer 9 is that environment aquation degrades (SHZJ) Additive.
The percentage thickness on surface layer 1 is 15%, and the percentage thickness in middle layer 2 is 70%, and the percentage thickness of internal layer 3 is 15%.
The percentage thickness of surface layer resin layer 4 is 90%, the percentage thickness of surface layer additive layer 5 is 10%.
The percentage thickness of middle layer resin layer 6 is 85%, the percentage thickness of middle layer additive layer 7 is 15%.
The percentage thickness of inner layer resin layer 8 is 95%, the percentage thickness of internal layer additive layer 9 is 5%.
Described oxidation compost degradation (DFJ) additive, environmental oxidation degradation (YJZJ) additive, the degradation of environment aquation (SHZJ) additive is equal are as follows: aminodithioformic acid iron.
The technical program uses binary process forming technique, refers on the basis of unitary technological forming (Recipe), Moulding process is increased, unitary Recipe can only occupy 50% technology content, in addition binary in process of producing product Moulding process could improve the basic fundamental guarantee of product, be mainly reflected in the thinned of product and thicken, and enhancing be thinned, effectively Cost is reduced, occupation rate of market is improved.
Binary process forming technique includes: unitary Recipe, binary moulding process.
Unitary Recipe includes:
1 oxygen-containing polyolefin controlled degradation material prescription technique；2 oxidative biological controlled degradation material prescription techniques；
3PVA biology base controlled degradation material prescription technique；4PBAT biology base controlled degradation material prescription technique；
5 triple controlled degradation technical formula techniques；6 quadruple controlled degradation technical formula techniques；
7 five heavy controlled degradation technical formula techniques；8 sixfold controlled degradation technical formula techniques；
9 three layers of water-retaining type controlled degradation technical formula technique.
Binary moulding process includes:
1 vacuum sizing moulding process；2 intelligent weighing system moulding process；
3 interlayer material controlling intelligent control moulding process；4 intelligent control thickness moulding process；
5 intelligent control width moulding process；6 intelligence correction moulding process；
7 liang of bubble method moulding process；8 three bubble method moulding process；
9 four bubble method moulding process；10 puma manipulator automatic winding moulding process.
Principle:
Biology base controllable full-degradable plastics can be divided into starch, polyesters and other classes according to raw material point；
Starch is abundance, cheap natural macromolecular material, and native starch is that have crystalline texture with inside Existing for little particle state, molecular structure has straight chain and two kinds of branch.For different plant varieties, starch granules The ratio of form, size and amylose and amylopectin content is all different.The partial size of starch granules is mostly in 15- 100μm.The chain compound that the glucose of amylose is combined with α-D-1,4 glycosidic bonds, relative molecular mass are (20-200) x104.The connection type of each glucose unit removes α-D-1 in amylopectin, outside 4 glycosidic bonds, there is also α-D-1, and 6 glycosidic bonds, Relative molecular mass is (100-400) x106.The property of starch and relative molecular mass, branch lengths and the straight chain of starch Starch is related with the ratio of amylopectin.The starch of high amylose content has preferable more suitable for preparing plastics, resulting product Mechanical performance.Native starch is intermolecular, and there are hydrogen bonds, and dissolubility is very poor, hydrophilic but not soluble easily in water, it has highly polar Crystallographic property.Since there are strong hydrogen bonding effects between the macromolecule of native starch, it is difficult to direct machine-shaping.To improve its processing Processing performance, generally by the hydrogen bond for opening starch interchain, the method for making starch lose crystallization is realized.Its operating method has Two kinds, one is the starch solutions that heating aqueous amount is greater than 90%, and starch granules starts to be swollen between 60~70 DEG C, in temperature Starch granules starts to burst apart after reaching 90 DEG C, and macromolecule interchain hydrogen bond is opened, and generates gelation；Another kind is closed It is heated under state, plasticates and squeeze out starch of the water content less than 28%.
Polylactic acid (PLA) is also referred to as polylactide, belongs to polyester family, and structural formula is (- O-CHCH3-CO-) n.
The most important two kinds of polymerizations of polylactic acid are direct polymerization method and ring-opening polymerisation method.Direct polymerization method is typical Polycondensation reaction.Using the activity of lactic acid, by heating, dehydration condensation occurs between lactic acid molecules, obtains polylactic acid.Directly Polymerization simple production process, production cost is low, is not required to the intermediate of reaction to be separated.But the molecular weight of polylactic acid is lower, point Son amount is distributed more widely, and performance is poor.Lactide ring-opening polymerisation method produces polylactic acid using two-step method.It is cyclized first by acid by dehydrating lactic Lactide is made, polylactic acid is then made by refined lactide ring-opening polymerisation again.Polylactic acid object made from ring-opening polymerisation method Reason mechanical property is preferable, and the production cost of the method is higher than direct polymerization method.
The degradation of polylactic acid is divided into simple hydrolysis (acid-base catalysis) and enzymatic hydrolysis degradation.The principal degradation side of polylactic acid Formula is bulk erosion.Hydrophobic polymer by the hydrolysis of labile bond on main chain (C-O key) become low relative molecular weight, Then water soluble molecules and monomer are further degraded to water and carbon dioxide under the action of enzyme.The degradation of polylactic acid is first The hydrolysis of amorphous area, followed by crystalline region.Hydrolysis can because carboxyl there are due to accelerate.There are self-catalysis works inside polylactic acid With, inside degradation speed specific surface it is fast.When degrading beginning, the hydrolysis of ester bond is isotropic in matrix.It is degrading In the process, carboxyl end group is to having hydrolyzed catalytic action.With the progress of degradation, carboxyl end group amount increases, and degradation rate is accelerated.
Water flea acute toxicity test
1. test is summarized
Water flea acute toxicity test compares test with degradation compost and standard compost, and detection contains degradation oxidative biological drop Solve toxic effect of the degradation compost to water flea of plastics.Degradation oxidized-biodegradable plastic usually contains after biodegrade Various metabolites, the undegraded complete product in part and inorganic matter.
The toxicity of degradation compost can be measured with survival rate of the water flea in degradation compost and standard compost.
2. test specification
This test uses OECD chemicals test rule #202 " water flea class biological activity test and the breeding examination of OECD It tests ".
3. test procedure
(1) compost eluate 1 part of compost and 4 parts of water heats 2 hours through 60 DEG C, is made.By the coefficient of dilution of this liquid It is set to 4 ×.
(2) diluted concentration determine the test coefficient of dilution be 4 ×, 8 ×, 16 ×, 32 ×, 64 × dilution.
(3) it is packed into 20ml diluent liquid in test tube, is put into 5 water fleas, 4 repetitions of each test.
(4) test temperature is 18~22 DEG C.It is protected from light.
The survival rate of water flea is detected after (5) 24 hours.If water flea is in heaven or recumbency bottom, do not lived in 10 second observation period It is dynamic, also think in heaven.
(6) if in the fresh water of standard, the death rate of water flea is more than 10%, and test is invalid.It need to test again.
Diluted concentration determines the result of trial test are as follows:
Standard fresh water: survival rate 100%
Standard compost 4 ×: survival rate 30%
Standard compost 8 ×: survival rate 70%
Standard compost 16 ×: survival rate 100%
Standard compost 32 ×: survival rate 100%
Standard compost 64 ×: survival rate 100%
Test diluted concentration be selected as 4 ×~20 ×.Such as 4 ×, 8 ×, 12 ×, 16 ×, 20 ×.It is small that test carries out 24 When.
According to test result, show that various degradation compost dilutions do not have significant adverse effect to the survival rate of water flea. When the survival rate of the degradation compost dilution that diluted concentration is 4X and 8X, water flea is greater than corresponding standard compost dilution.
The embodiments of the present invention have been described in detail above, but content is only the preferred embodiment of the present invention, It should not be considered as limiting the scope of the invention, any changes and modifications in accordance with the scope of the present application, It should still be within the scope of the patent of the present invention.

Claims (6)

1. a kind of oxidative biodegradation rubbish from cooking bag, it is characterised in that:
Including surface layer, middle layer, internal layer；
The surface layer includes surface layer resin layer, surface layer additive layer, and the surface layer additive layer is located at the lower section of surface layer resin layer, The surface layer resin layer is sixfold controlled degradation (LCSZ) resin, and the surface layer additive layer is that oxidation compost degradation (DFJ) adds Add agent；
The middle layer includes middle layer resin layer, middle layer additive layer, and the middle layer additive layer is located at the lower section of middle layer resin layer, The middle layer resin layer is oxygen-containing polymeric material controlled degradation (JHSZ) resin, and the middle layer additive layer is environmental oxidation degradation (YJZJ) additive；
The internal layer includes inner layer resin layer, internal layer additive layer, and the internal layer additive layer is located at the lower section of inner layer resin layer, The inner layer resin layer is oxygen-containing resin controlled degradation (YZSZ) resin, and the internal layer additive layer is the degradation of environment aquation (SHZJ) additive.
2. a kind of oxidative biodegradation rubbish from cooking bag according to claim 1, it is characterised in that: the thickness on the surface layer Percentage is 15%, and the percentage thickness in the middle layer is 70%, and the percentage thickness of the internal layer is 15%.
3. a kind of oxidative biodegradation rubbish from cooking bag according to claim 1, it is characterised in that: the surface layer resin layer Percentage thickness be 90%, the percentage thickness of surface layer additive layer is 10%.
4. a kind of oxidative biodegradation rubbish from cooking bag according to claim 1, it is characterised in that: the middle layer resin layer Percentage thickness be 85%, the percentage thickness of middle layer additive layer is 15%.
5. a kind of oxidative biodegradation rubbish from cooking bag according to claim 1, it is characterised in that: the inner layer resin layer Percentage thickness be 95%, the percentage thickness of internal layer additive layer is 5%.
6. a kind of oxidative biodegradation rubbish from cooking bag according to claim 1, it is characterised in that: the oxidation compost drop It is equal to solve (DFJ) additive, environmental oxidation degradation (YJZJ) additive, environment aquation degradation (SHZJ) additive are as follows: two thio ammonia Base ferric formate.
CN201910490002.6A 2019-06-06 2019-06-06 A kind of oxidative biodegradation rubbish from cooking bag Withdrawn CN110509625A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910490002.6A CN110509625A (en) 2019-06-06 2019-06-06 A kind of oxidative biodegradation rubbish from cooking bag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910490002.6A CN110509625A (en) 2019-06-06 2019-06-06 A kind of oxidative biodegradation rubbish from cooking bag

Publications (1)

Publication Number Publication Date
CN110509625A true CN110509625A (en) 2019-11-29

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Country Status (1)

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Application publication date: 20191129